Improved draft-tube for soda-fountains



UNITED STATES PATENT OFFICE.

GUSTAVUS D. DOWS, OF BOSTON, MASSACHUSETTS.

IMPROVED DRAFT-TUBE FOR SODA-FOUNTAINS.

Specification forming part of Letters Patent No. 42,078, dated March 29, 1864.

To (LZZ whom it may concern:

Be it known that 1, GUsTAVUs D.' DOWS, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Draft-Tube for Soda Apparatus; and I do hereby declare that the following, taken in connection with the drawings which accom pany and form part of this specification, is a description of my invention, sufficient to enable those skilled in the art to practice it.

My invention relates to the construction of the eduction cocks or orifices of soda-forint ains, and is intended to facilitate the preparation of the common aerated soda beverages (prepared by mixing water highly charged with carbonio-acid gas, and drawn from a fountain or retort, with sirups) by dispensing with the use of the bottle commonly employed to draw that part of the soda-water which imparts the effervescence to the beverage. In the mode in general use the soda-water is first drawn from the fountain in quantity sufficient by the impulse of the current to thoroughly intermix or commingle the soda-water with the sirup contained in a cup or tumbler held beneath the eduction-tube. The agitation ofthe impregnated water in this operation, and its consequent contact with the air and the Huid sirup, liberates the gas and leaves the compound ineft'ervescent. A charging-bottle is therefore held against the eductiontube, which is made of such external diameter as to iill the mouth of the bottle, and the soda-water being drawn therein is decanted into the cup, and produces the desired effervescence. As this operation requires a very .considerable time and manipulation, it has been a desideratum to dispense with the use of the charging bottle, drawing the soda for mixing with the sirup and that for producing the effervescence into the same cup with the sirup either at one or with successive manipulations, and through 'one or adjacent delivering-orifices.

My invention consists in the arrangement or employment of a device or devices to operate within the ednetiontube or chamber of a soda apparatus, for the purpose of retarding at will the flow or impulse ofthe current from the fountain, and allowing the soda-water to be drawn from the eduction-chamberin the respective states necessary to prepare the beverage-that is to say, with the full force of the pressure from the fountain and with a retardation of that force, the soda-water in both states flowing by one manipulation of the valve controlling its passage from the fountain.

Figure 1 of the drawings represents an elevation of a draft tube or nozzle of a soda apparatus embodying my invention. Figs. 2 and 3 show vertical central sections of the same, and Fig. et a horizontal section taken just above the interceptor.

a denotes the delivery-tube; b, the eductionorifice thereof; c, the end of the pipe or tube leading from the fountain, the nozzle a being screwed thereupon, as shown. The passage l through the pipe c is of a much smaller diameter than thegeneral diameter of the eduction-chamber e or the orice b. At the bottom of the chamber e, and on one side of the orifice b, I hang a bent lever, one arm, f,-

of which extends in a horizontal direction from the nozzle a in the form of or as a handle, while the other arm, g, extends up within the chamber e, as seen in Figs. 2 and 3. At or near the top of the arm g is affixed an intercepting cup or disk, h, extending from the arm toward the center of the chamber. In

their normal position the arms f g and cup or interceptor h remain as shown in the drawings by the black lines, while by lifting the handle f the parts are brought into the position shown in red lines.

The operation of the invention is as follows: Opening the valve of the passage d, the sodawater iiows with the full force of its expulsion from the fountain and tube c through the chamber e and oriiice b, the interceptor h lying back from the path of the current and v allowing it to iiow uninterruptedly into the cup or tumbler containing the sirup placed to receive it, this full impetus being necessary to thoroughly intermix and commingle the sirup and soda-water, so that, when the cup is filled with soda-water, without this force the two iiuids shall instantly unite and commingle. -As before explained, this first operation liberates the gas from the soda-water, and therefore, after so drawing the soda-water in sufficient quantity for the mixing process, the operator lifts the handle f, which carries the interceptor h directly into the path of the current, and breaks its force while in the chamber c, and before it .reaches the atmosphere beyond the oriiice b, so that it then iiows with comparative quietness from the draft-tube and into the tumbler, imparting,l to the beverage all or nearly all of the efferves eing gas which it contains when it leaves the tube c, Whereas if it enters the eup with its full force it so agitates the whole body as to liberate the gas and very much impair the pleasant ett'eets it possesses as a beverage from its eferveseing properties. An extension, t',

ot' the arm g may be so made as to strike against the tube c when the arm j' is raised, and hold the interceptor h in position with respect to the current.

1t will be readily seen with what facility the soda-Water is drawn by my invention, as 

